Solid-Diffusion Synthesis of Single-Atom Catalysts Directly from Bulk Metal for Efficient CO2 Reduction

Abstract

Electroreduction of CO 2 into value-added products is an effective approach to remit the environmental and energy issues. In this study, a hierarchical, selfsupported, and atomistic catalyst was successfully synthesized based on the solidstate diffusion strategy. This catalyst can be directly used as a binder-free electrode and exhibits superb catalytic CO 2 electroreduction performance. Directly synthesized by bulk metal foil, this catalyst is scalable to meet the industrial demand.

Strong metal-support interaction promoted scalable production of thermally stable single-atom catalysts

“…Atom trapping is an effective method to produce thermally stable SACs [38][39][40] but still relies on wet chemistry to prepare the nanocatalysts as precursors. Based on atom trapping, Wu and Li have developed several approaches, including thermal emitting and solid diffusion, to transform bulk metals into single atoms 18,41,42 and hence open a pathway to scalable SAC production. Unfortunately, these approaches are mainly limited to carbon or N-doped carbon supports and require ammonia or HCl, which present environmental challenges.…”

Controlled Synthesis of a Vacancy‐Defect Single‐Atom Catalyst for Boosting CO2 Electroreduction

“…[7][8][9][10][11][12][13][14] There is still difficult for achieving high Faradaic efficiency at high current density,and only few electrocatalysts display high current density and high Faradaic efficiency simultaneously. [15][16][17] Recently,single atomically dispersed catalysts (also called single-atom-catalysts,SACs) have been drawn much attention in heterogeneous catalysis,which is due to their 100 %atomic utilization efficiency, as well as their outstanding catalytic performance in water splitting, [18][19][20][21] oxygen reduction, [22,23] CO 2 reduction, [9-12, 14-17, 24, 25] and other heterogeneous catalytic reactions. [26][27][28] Many factors can affect the catalytic performance of SACs.Besides the supports,the loading amount and coordination numbers of SACs,t he defects on the support have also been found to be atunable factor for optimizing the catalytic performance of SACs,t hrough inducing different local electronic densities of state of metals.…”

Single-atom nickel confined nanotube superstructure as support for catalytic wet air oxidation of acetic acid

“…Doping N atom into CNT (NCNT) will alter the property of CNT and this strategy will also provide the coordinate sites for metal atom anchoring into carbon framework 4 . Zhao et al adopted solid-state diffusion method producing single Ni atoms coordinated in NCNTs, which exhibited superb catalytic CO 2 reduction reaction performance 5 . Fu and coworkers reported that the transition metals (Fe, Co, Ni, Cu et al) can be used as promoters to enhance catalytic performances of noble metal catalysts for the reactions involving oxygen activation 6 .These progresses inspired us to design a single-atom Ni confined NCNTs (Ni-NCNTs) as a new modified support to tune the activity of the loaded Ru nanoparticles (NPs).…”